Intelligent Cube Hopper MKII
Rev 2.0
Page 10
4.4. Continuous mode anti-jam operation
If the hopper for some reason blocks (jams) the motor current will rise fast. When the current exceeds
a certain trip level (around 1.6 Amp), the motor will be reversed for T_clear ms. This is done to
withdraw any coins from the coin exit port that may have caused the block.
After the first reverse period the hopper is started again. If the hopper still blocks, the motor will be
reversed again for T_jamrev ms, and then started again. This procedure is repeated until the hopper
starts ejecting coins again. If the jam is not cleared, the motor will stop due to its thermal fuse
protection.
See timing figure below.
Clear coin exit port
Try to payout again
Anti-Jam
Forward
Motor Stopped
Reverse
T_clear
T_jamrev
Coin-Sensor (NC)
coin enters exit port
coin withdrawn from
exit port
Coin Exit (pin 6)
Jam occurs here
false pulse
Hopper still jammed
Figure 3: Anti-Jam timing in continuous mode
